Spatial variability of heavy metals in the coastal area of Monastir and origin of pollution

Khiari, Nouha; Khalil, Nadia; Charef, Abdelkrim; Atoui, Abdelfattah

doi:10.1007/s12517-022-09586-2

Cited by 5 publications

(7 citation statements)

References 30 publications

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“…A toxic effect can be detected for Cd in the central part of Monastir Bay (S6), which is known as the outfall of the agricultural zone where pesticides are used, and in the coastal zone, there are sites for ships and ship repairs with the installation of offshore aquaculture cages. This cadmium accumulation in sediment has been observed in recent decades (Khiari et al 2022).…”

Section: Metal Accumulation In Sedimentmentioning

confidence: 60%

“…Metal accumulation in the plastisphere is most common near Ras Dimas and Ksibet El Madiouni, where there is a speci c morphological feature with a very shallow water depth, not exceeding 0.5 m depth and with very low hydrodynamics, as explained by Khiari et al (2022). As shown in Fig.…”

Section: Metal Accumulation In Sedimentmentioning

confidence: 92%

“…8, trace elements in the plastisphere have accumulated mainly in this zone, which is characterized by low bathymetry. Due to the marine barrier (Dahr) and Ras Dimas spit, which have canceled the hydrodynamics in this area, these pollutants, brought by the runoff and released by the port and shing activities, have been deposited on the plastisphere without any mechanical dynamics (Khiari et al 2022).…”

Section: Metal Accumulation In Sedimentmentioning

confidence: 99%

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Microalgae colonization and trace element accumulation on the plastisphere of marine plastic debris in Monastir Bay (Eastern Tunisia)

Tarchi

Zaaboub

Alsubih

et al. 2022

Environ Sci Pollut Res

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In this study, we examined the epiplastic microalgal community that developed on low-density polyethylene (LD-PE) plastic debris found in two distinct regions of the Monastir Bay (Tunisia): the coast exposed to anthropogenic discharges and the open sea in front of the Kuriat Islands. The analysis of trace elements accumulated in the plastisphere was also carried out. The collected plastispheres were predominantly composed of cyanobacteria. Chlorophytes and diatoms were also found. Euglenophyceae was also recorded but with comparatively low relative abundance (RA), whereas dino agellates were almost absent. The diatom showed a high diversity of species (25 species). Potentially harmful microalgae (PHM) were more abundant in the plastisphere than in seawater at all stations. For all coastal area stations, most of the PHM colonizing the plastisphere are potentially harmful cyanobacteria. For S1 (offshore station), the PHM community pro le was characterized by the dominance of potentially harmful diatoms. The main potentially harmful cyanobacterium identi ed on the plastisphere was Phormidium sp. Pseudo-nitzschia spp. was the only potentially harmful diatom observed on the plastisphere. Accumulation of trace elements in plastisphere was higher than that in sediments. Trace elements in plastisphere are ranked with a very high contamination factor at all sites, according to the sequence Pb > Cu > Cd > Ni > Zn. The accumulation of trace elements in the plastisphere is highest near areas with harbor and industrial activities and the urban rejects zone.

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Section: Metal Accumulation In Sedimentmentioning

confidence: 60%

Section: Metal Accumulation In Sedimentmentioning

confidence: 92%

Section: Metal Accumulation In Sedimentmentioning

confidence: 99%

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Microalgae colonization and trace element accumulation on the plastisphere of marine plastic debris in Monastir Bay (Eastern Tunisia)

Tarchi

Zaaboub

Alsubih

et al. 2022

Environ Sci Pollut Res

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“…The bay has a shallow depth, which causes signi cant wave transformation (Souissi et al, 2014;Khiari et al, 2017). Monastir is characterized by several water sources that ow into the bay, including the Khniss drain, which is connected to the El Melah and Monastir Sebkeha, Essouk, and Mansoura Streams (Khiari et al, 2022).…”

Section: Study Area Description and Sample Collectionmentioning

confidence: 99%

“…Trace metal pollution is a major concern, as these pollutants are persistent, toxic, and can accumulate in organisms (Ahmed et al, 2022;Chen et al, 2018;Zhao et al, 2019). The Mediterranean Sea is known to be one of the most polluted seas globally (Khiari et al, 2021;Khiari et al, 2022), mainly due to human activities and the discharge of organic and inorganic pollutants through rivers and wastewater treatment. In recent years, the pollution of trace metals in the Mediterranean environment has become a global issue (Romano et al, 2021), originating from both natural and human sources (Bem et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

The long-term evolution model of metallic contamination of Monastir-Sayada Coast as deduced from the geochemical and statistical analysis

Khiari,

Charef,

Khadhar

et al. 2023

Preprint

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Coastal regions are especially susceptible to both natural and human-induced pressures, and it is crucial to evaluate these pressures. This research aims to investigate the monitoring of human activities through river discharges in order to identify potential ecological risks and examine the long-term changes in metallic contamination in Monastir-Sayada. To accomplish this, four sediment samples were collected from various locations along the Monastir coast, specifically near the source of pollution, to analyse the concentrations of heavy metals like Zinc (Zn), Cadmium (Cd), Copper (Cu), Lead (Pb), Manganese (Mn), Nickel (Ni), and Iron (Fe). The findings indicate that the average concentrations of these metals in the sediment cores followed a descending order of Fe > Zn > Mn > Cu > Cd in front of the Monastir effluent, Fe > Mn > Zn > Pb > Cd > Cu > Ni in the effluent at Frina region, Fe > Mn > Zn > Cd > Ni > Pb > Cu in the Melah stream, and Fe > Mn > Cd > Zn > Cu in front of the Essouk stream at Lamta. Based on the enrichment factor (EF) and contamination factor (CF), the long-term evolution of the Monastir-Sayada coast is considered highly polluted for Pb and Cd, posing a relatively high potential ecological risk. The heavy metals are believed to originate from similar human activities, as indicated by the principal component analysis (PCA) and cluster analysis (CA). Pollution from heavy metals can have long-lasting effects on coastal sediments, emphasizing the importance of preventing such pollution in the first place.

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A Natural Biomass-Sediment as a Hybrid Organic-Mineral Sorbent for the Removal of Zinc in Aqueous Systems

Khiari,

Sdiri,

Chemingui

et al. 2023

Water Air Soil Pollut

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Spatial variability of heavy metals in the coastal area of Monastir and origin of pollution

Cited by 5 publications

References 30 publications

Microalgae colonization and trace element accumulation on the plastisphere of marine plastic debris in Monastir Bay (Eastern Tunisia)

Microalgae colonization and trace element accumulation on the plastisphere of marine plastic debris in Monastir Bay (Eastern Tunisia)

The long-term evolution model of metallic contamination of Monastir-Sayada Coast as deduced from the geochemical and statistical analysis

A Natural Biomass-Sediment as a Hybrid Organic-Mineral Sorbent for the Removal of Zinc in Aqueous Systems

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